The Narrowing Gap in New York City Teacher Qualifications and its Implications for Student Achievement in High-Poverty Schools. August 2007. Donald Boyd, Hamilton Lankford, Susanna Loeb, Jonah Rockoff, and James Wyckoff. Policy Brief
How Changes in Entry Requirements Alter the Teacher Workforce and Affect Student Achievement. November 2005. Donald Boyd, Hamilton Lankford, Pamela Grossman, Susanna Loeb, and James Wyckoff. Policy Brief